Definitions of re:

noun: the syllable naming the second (supertonic) note of any major scale in solmization
noun: ancient hawk-headed Egyptian sun god; a universal creator
noun: a rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys; is obtained as a by-product in refining molybdenum
name: A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #17177)